About this 3D model

My first Thing :) A replacement holder for the back of your UP! Mini for use with 9cm reels with 3cm holes. I'm using this right now with a PRNT3D spool and it works just fine. I just got a kilo spool in the post that was *just* too snug on this holder - if you get the same then taking a scalpel to the NMN tag will get you enough room to work ;)